[PATCH RFC 03/11] nvmet: Add nvmet_fabrics_ops flag to indicate SGLs not supported

[Christoph Hellwig]

On Thu, Mar 13, 2025 at 12:18:04AM -0500, Mike Christie wrote:
> The nvmet_mdev_pci driver does not initially support SGLs. In some
> prelim testing I don't think there will be a perf gain (the virt related
> interface may be the major bottleneck so I may not notice) so I wasn't
> sure if they will be required/needed. This adds a nvmet_fabrics_ops flag
> so we can tell nvmet core to tell the host we do not supports SGLS.

I'd prefer to be able to support SGLs if we can, but if not I could
live with a flag of some sort.